Let's get some pictures in the gallery of Metro/Swift/Firefly cars! You simply have to go to your "User CP" and click on "Pictures & Albums" and then click "Add Album". After you name it, you can upload pics from your computer there and then you will find a link that says "Add Pictures to a Group" where you can add them in.
If your picture is too large, I suggest downloading the free program called "Irfanview" (Google it) and this program allows you to crop, resize, change extensions, add text, add effects, etc. It is the best free image tool out there. If you need help, just ask!